<template>
  <el-container class="home-contaioner">
       <!-- 页面主题区 -->
  <el-header>
    <div>
      <img src="../assets/img/heima.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="logout">退出</el-button>
  </el-header>

  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse ? ' 64px' : '200px'">
      <div class="oggle-button" @click="toggleCollapse">|||</div>
      <!-- 侧边栏 菜单去 -->
      <el-menu
      background-color="#545c64"
      text-color="#fff"
      active-text-color="#409Eff"
      unique-opened
      :collapse="isCollapse"
      :collapse-transition="false"
      :router="true"
      :default-active="activePath"
      >
      <!-- 一级菜单 -->
      <el-submenu :index="itme.id + ''" v-for="itme in menulist" :key="itme.id">
         <!-- 一级菜单的模板区 -->
        <template slot="title">
          <i :class="iconsObj[itme.id]"></i>
          <span>{{itme.authName}}</span>
        </template>
        <!-- 二级菜单 -->
         <el-menu-item
          :index="'/' + children.path"
          v-for="children in itme.children"
          :key="children.id"
          @click="saveNavState('/' + children.path)"
          >
          <template slot="title">
          <i class="el-icon-menu"></i>
          <span>{{children.authName}}</span>
        </template>
         </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 右侧内容主题-->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    // 点击按钮 切换菜单折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang='less' scoped>
* {
  padding: 0;
  margin: 0;
}
.home-contaioner {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.oggle-button{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
